Since then, and particularly in the last three years, Poirier has stepped up with a string of high profile bouts and a slew of big victories, leading to his redemption shot against McGregor.
Much of the spotlight ahead of UFC 257 is squarely focused on McGregor, but we're on hand to bring you all the key stats on Poirier ahead of the encounter.
RadioTimes.com brings you all the important info about Dustin Poirier ahead of UFC 257.
Who is Dustin Poirier?
Poirier is a 32-year-old UFC born in Lafayette, Louisiana, USA and fighting out of Coconut Creek, Florida.
The Diamond currently ranks second in the UFC Lightweight rankings, only behind Justin Gaethje and reigning champion Khabib Nurmagomedov.
His first bout against McGregor knocked him back, but he boasts a range of notable scalps including that of Max Holloway (twice), Eddie Alvarez, Gaethje, Anthony Pettis and Dan Hooker.
There are few big fighters that Poirier hasn't been able to take down though, like McGregor, his last defeat came at the hands of Khabib.
Dustin Poirier height and weight
Poirier stands at 5ft 9in (175cm) and tends to weigh around 155lbs (70kg).
The 32-year-old fighter boasts a 72in (183cm) reach and fights with a southpaw stance.
Dustin Poirier record
Poirier has a strong record of 26 wins, six defeats since his first professional fight in 2009.
Last five fights:
W – Dan Hooker (UFC on ESPN)
L – Khabib Nurmagomedov (UFC 242)
W – Max Holloway (UFC 236)
W – Eddie Alvarez (UFC on Fox)
W – Justin Gaethje (UFC on Fox)
Dustin Poirier's next fight
You can watch Dustin Poirier take on Conor McGregor at UFC 257 exclusively live on BT Sport Box Office in the UK.
The event will cost a one-off fee of £19.95 and the platform is usually reserved for the biggest global events.
If you purchase an event via Box Office, you can choose to enjoy it via TV or online through a live stream service.
BT Sport Box Office can be streamed through a computer or a mobile device such as a phone or tablet giving you full flexibility to enjoy how you wish.
US fans can watch the event live in the US via ESPN+.
On its own, EPSN+ costs $5.99 per month or $59.99 per year. You can purchase UFC 257 only for $69.99 or combine it with a ESPN+ annual subscription for $89.98, an over 25% saving.
Enjoy the whole event with our how to watch UFC 257 guide.
Check out the full UFC schedule 2020 for upcoming fights, dates, cards and previews.
Looking for what else is on TV? Check out our TV Guide.
